Device for operating elevator-gates.



3 o 9 l 7 1 R A M D 0 9 2 2 7 m N APPLIOATION FILED 901. 13, 1902.

.10 MODEL.

No. 722,590. I PATENTED MAR. 10, 1903.

. 0. W. KIRSGH. DEVICE FOR OPERATING ELEVATOR GATES.

APPLICATION FILED 0O T.13, 1902.

.10 MODEL. 1 2 SHEETS-SHEET 2.

6 I 1 2. Q id, I

UNITED STATES PATENT OFFICE.

CHARLES W. KIRSOI-I, OF CHICAGO, ILLINOIS, ASSIGNOR TO ELEVATOR SAFETY DEVICE CO., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

DEVICE FOR OPERATING ELEVATOR-GATES.

SPECIFICATION forming part of Letters Patent No. 722,590, dated March 10, 1903.

Application filed October 13, 1902. Serial No. 127,149. (No model.)

' tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a novel construction in a safety-gate for elevators, the object being to provide a gate which will remain closed while the elevator is above or below the floor controlled by such gate and may be opened as the elevator reaches such floor or such floor passed without opening the gate, as the operator may desire; and it consists in the features of construction and combinations of parts hereinafter fully described and claimed.

In the accompanying drawings, illustrating my invention, Figure 1 is a central vertical section of an elevator-shaft and elevator provided with safety-gates and devices for operating same constructed in accordance with my invention. Fig. 2 is a detail view in elevation of the rack and drum controlling the gate. Fig. 3 is a section of same on the line 3 3 of Fig. 2. Fig. is a fragmentary detail elevation of the cam for actuating the drum, said figure being so arranged relatively to Fig. 2 as to show said cam in position below the parts of Fig. 2 operated thereby.

Referring now to said drawings, A indicates the vertical guides of an elevator-shaft; B, the elevator or car movable therein; 0 and D, two floors of the building, and E the gate movable in guides F and controlling the opening G.

Secured to one of the guides A between the floors D and E is a bracket H, extending horizontally and provided with a longitudinal slot I, in which two blocks J and K are longitudinally movable. Said bracket H is provided on its upper and lower edges with flanges L, to the upper of which a rack M is secured, the teeth of which lie in a plane parallel with the slot I. In said block J is journaleda shaft N, carrying a gear-pinion O, meshing with said rack M and a drum P, upon which a cable Q, connected at one end with said gate E, is wound, said cable being suitably trained over pulleys to raise and lower said gate. On said bracket H is a stop R, which engages the block J to limit its movement in one direction. The block K is connected with the block J by means of two tension-springs S, which serve to normally hold said blocks in contact.

Secured to one of the standards of the car 13 is a triangular cam T, having pivoted wedge-shaped ends U, each provided with a projection V, adapted to engage a stop W on the body of the cam to prevent said ends U from turning in one direction. Each of said ends U is connected by means of a rod X with one end of a lever Y, pivoted between its ends to the standard of the car B, carrying said cam T, said connection being so made that when the other end of said lever is depressed the said ends U will be turned back, as shown in dotted lines in Fig. 4. The said block K carries a stud on which a roller Z is revolubly mounted, which lies in the path of the inclined faces of the cam T and when engaged by the latter is forced toward the free end of said bracket and carries withit the block J and parts carried thereby. During said movement the drum is ob viously revolved and raises the gate E, so that when the floor of the car B is flush with any floor of the building the gateE is raised. The said cam is cut away at its apex to form a fiat portion, against which the roller Z bears while the floor of the car is flush or nearly flush with the floor of the building. When it is desired to pass a floor without opening the gate, the said ends U are turned to the position shown in dotted lines in Fig. 4:, thereby engaging the roller Z on the opposite side and forcing the block K away from the block J against the action of the springs and cansing said roller to be revolved by the base of the cam T, said block J remaining stationary during this time, and hence leaving the gate closed, as will be obvious. The operation remains the same whether the movement of the car be up or down. One of said brackets H and appended parts must be provided above each of the floors of the building.

The gate is closed by its own weight, such closure being rendered as gradual as the opening by the engagement of the roller Z with the second inclined side of the cam.

I claim as my invention 1. An elevator-gate-operating device comprising a drum operating the gate, a member movable in suitable guides and carrying said drum, a stop limiting the movement of said member in one direction, a member connected with said drum-carrying member by means of springs and movable in one direction relatively thereto, and devices carried by the elevator-car adapted to engage said second member to move the same in either of two directions, to open the gate, or pass the floor without operating the gate.

2. An elevator-gate-operating device comprising a drum operating the gate, a member movable in suitable guides and carrying said drum, a stop limiting the movement of said member in one direction, a member connected with said drum-carrying member by means of springs and movable in one direction relatively thereto, a cam carried by the elevatorcar and adapted to engage said second member to move the same to actuate said drum, pivoted members on said cam, and a lever controlling said members to throw said pivoted members to engage said second member on either side to either open the gate or pass the floor Without opening same.

' In testimony whereof I affix my signature in presence of two witnesses.

CHARLES W. KIRSCH. Witnesses:

RUDOLPH WM. LoTz, ARTHUR C. Lorz. 

